These outlet caps use a non-adhesive, pressure‑mounted (press‑fit) design and are made of polypropylene.
The caps are made of polypropylene. Reviewers typically describe them as plastic but sufficiently sturdy for regular use; at least one reviewer reported repeated insertion and removal without failure.
They use a non‑adhesive, pressure‑mounted (press‑fit) design that holds them in the outlet without glue, allowing them to be pulled out and reinserted as needed; the product listing specifically calls them removable and reusable.
The product is sold as a 36‑pack.
Outlet caps help prevent children from inserting fingers or objects into unused electrical outlets and provide outlet coverage across multiple rooms.
The listing indicates the product is JPMA‑certified and meets applicable ASTM standards.